[Chemical Composition] A completely homogeneous image can be formed between Mg[CO 3 ] and Fe[CO 3 ], and sometimes a mixture of Mn, Ca, Ni, Si or the like is formed.
[Crystal Structure] Trigonal System; 
. Magnesite : rhombohedral unit cell: a rh = 0.566 nm; α = 48 ° 10';  Z = 2; hexagonal unit cell: a h = 0.462 nm, c h = 1.499 nm; Z = 6.
Siderite ore: a rhombohedral unit cell: a rh = 0.576nm; α = 47 ° 54 '; Z = 2; a hexagonal unit cell: a h = 0.468nm, c h = 1.526nm; Z = 6. The same structure as calcite .
[Form] The crystal is in the shape of a rhombohedron, a short column or a triangular facet. Usually it is a granular, earthy, dense block assembly (Figures H-5, H-6).
FIG magnesite ore H-5 crystals aggregate
Figure H-6 Siderite crystal aggregate
[Physical properties] Rich Mg end users are white or light yellowish white, grayish white, sometimes with a reddish hue, rich in Fe yellow to brown, brown; glass luster. Cleavage {10 1} Complete. Hardness 3.5 to 4.5. The relative density of 2.9-4.0, the relative density and refractive index of Fe-rich ones increase.
[genesis and occurrence] Magnesite is mainly composed of Mg hydrothermal liquid substituted dolomite and ultrabasic rock, in addition to sedimentary type. Siderite is also available in both sedimentary and hydrothermal forms.
[Identification characteristics] Similar to calcite, the difference is that the powdered cold HCl does not blister or the action is extremely slow, and the heated HCl is vigorously foamed.
[Uses] magnesite refractory brick system can be used (3000 ℃ can withstand high temperatures), magnesium cement, metal magnesium may extract; as siderite iron ore mining.
Tungsten carbide mixed Metal Alloy Powder is commonly used in PTA (Plasma Transferred Arc) welding. PTA welding is a process that involves the deposition of a hardfacing material onto a base metal to provide wear resistance, corrosion resistance, and improved mechanical properties.
Tungsten carbide is a very hard and wear-resistant material, making it ideal for applications where high abrasion resistance is required. It is often mixed with other metals, such as nickel, cobalt, or chromium, to form a metal alloy powder. These metal alloys enhance the properties of the tungsten carbide and improve its compatibility with the base metal.
The tungsten carbide mix metal alloy powder is typically fed into the PTA welding torch, where it is melted and propelled onto the surface of the base metal using a high-energy plasma arc. The molten powder forms a hard, dense coating that bonds with the base metal, providing excellent wear resistance and protection.
The specific composition of the tungsten carbide mix metal alloy powder can vary depending on the application requirements. Different ratios of tungsten carbide and other metals can be used to achieve desired properties, such as hardness, toughness, and corrosion resistance.
Overall, tungsten carbide mix metal alloy powder is a versatile and effective material for PTA welding, offering superior wear resistance and protection for various industrial applications.
Mixed Powder,Arc Welding Powder,Pta Welding Powder,Plasma Welding Powder
Luoyang Golden Egret Geotools Co., Ltd , https://www.hvofpowders.com